A new Sea Traffic Management (STM) project has received EU funding from the Interreg Central Baltic Programme. EfficientFlow covers many aspects of Sea Traffic Management in the ports of Rauma, Finland and Gävle, Sweden, as well as STM-enabled traffic flow management for the many large ferries that sail through the archipelago between Sweden and Finland. The project will run 2018-2020 with a budget of EUR 4.5 million.